The mean is the most commonly used measure of average close averageA value to best represent a set of data. There are three types of average - the mean, the median and the mode.. To calculate the mean ...
There are two formulae for standard deviation. \(s = \sqrt {\frac{{\sum {{{(X - \bar X)}^2}} }}{{n - 1}}}\) (where n is the sample size). The second formula is a re ...
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